The research for a "modern life style" in a Saudi house started from the most sacred needs of the future owners, social-cultural and climatic ones. The clear hierarchic structure of public and private spaces linked with the necessity of climatic comfort, explains how important could be a correct solar orientation as much as a bright use of "patios". A "modern" Saudi House, capable of sustaining itself, smart in the use of resources, a place reflecting the soul of the inhabitants.